Process of dyeing and product thereof.



UNITED STA earns oFFioE.

ROBERT E. SCHMIDT. 0F ELBERFELD. GERMLNY, ASSIGZIGB TO FLBBEJFABB-Ihi YORK. FBIEDR. BAYER & (30.. 0F ELBEEEELD. GEBI-EANY, A CGEPDEATION 01" GERMANY.

PROCESS QF DYEING AND PRODUCT THERECF.

R0 Drawing.

T 0 all whom "it may concern:

3e it known that l. ltoznznr E. Sumner, doctor of philosophy. chemistmitizen of the German Empire. residing at Elberfeld. Germany, have invented new and useful Iniprorements in Processes of Dyeing and Products Thereof. of which the following is a specification.

I have made the surprising discovery that: the acidylized am'inoanthraqutnones can he used as valuable at dyes. They yield with alkaline reducing agents rats which dye the textile fiber from yellow to red to blue shades of excellent fastness.

In order to illustrate my new process more fully the following example is given, the

parts lain; by weight :Stir up 40 kilos of i diam-tyl-l.B-tliaminoanthraquinone (10 per cent. paste) with); liters of warm water. add to this mixture 40 liters of a hydrosulfite solution 20 Be. and 6 liters caustic soda lye ll)" in. After a short time the color is completely dissolved. Prepare a dyebath which should contain 2000 liters water. l liter caustic soda lye 30 Be. and :2 liters hydrosulfite solution and 80 parts of common salt and add to this cold bath the dye solution prepared as above indicated. through a sieve. Stir the bath well, let stand during HD1119 minutes, enter 100 kilos well wetted out cotton and work for 1 hour in the cold hath. A fter dyeing. squeeze out well. rinse. aml'acidulate the goods in a hath containing 2 com. sulfuric acid of 66 Be. icr liter. rinse and finallv soa A Yer i2 t clear orange-yellow shade is thus obt -\ined.

Wool is dyed in an analogous way: Stir up 10 kilos lliaeetyl-L5-diannnoanthraquinone (10 per cent.) with 910 kilos caustic soda lye 30 ll. and 250 liters of a hydrosulfite Suillllvll- 17 ll. When all the color is thoroughly dissolved, add this solution to the dyebath which consists of 1200-1500 lit -rs of water of 30 136., to which liter caustic soda lie 30' B6. and 2 liters of a hydrwnltite solution 11"" Be. and 2040 kilos (Haida-rs salt has previously been added. linrr 7:0 kilos wool, work fol f to 1 hour at 230" the goods being continually immersed in the liquor. .At'ter dyeing. s ueeze outr'ell, exp-w. rin e. ariduhue. wash and dry. i

Specification of Letters Patent.

Patented July 19', 1910.

A very fast orange-yellow shade is thus obtained.

Silk and charged silk are dyed in an analogous way. In order to use the aeidylized aminoanl hraqninones for printing I proceed as followsfthe parts being by Weight 1-100 parts of diacetyl-l.S-diaminoanthraqninone (10 percent. pasta-hire mixed with 74 parts of tragacanth thickening (65:1000). 1.1 parts of tin cry tals. 7 parts of copper-as powder, 8 parts of tartar powder are added and the paste is well stirred. Print, run through soda lye (18 Be.) at 85, aeidulate, rinse and soup at (30 C. A very fast clear orange-yellow shade is thus obtained.

()ther reducing agents g. hydrosullites may be used. Other aeidylized aminoanthraquinones maybe used with the same success a. 1 fornzyl-il amino-ant hraqninone (dyes orange),diformyl-L-t-diaininoanthraquinone (dyes orange-brown), diformyl-LS-diaminoantlzraquinone(dyes orange) acetyl-l-aminoanthraquinone (dyes greenish-yellow), diacetyl-lA-diaminoanthraquinone (dyes yellow-red diacetyl-l.S-diaminoanthraquinone (dyes orange), cinnamyl'l-aminoanthraqninone (dyes yellow), acetyl-l-amino-- ('hloroanthraqninone (dyes m'eenish-yellow) acetyl-l anniuoanthraqninone l inert-aptam ethylether {dyes (range-red), isovaleryl- 1.. diaminoanihraquinone (dyes yellow), (licinnamyldianiinoanthrarufin (dyes blue).

I claim: I

1. The process of treating textile fiber consisting in reacting on an acidylaininoanthraqninone with alkaline reducing agents to form a solution. applyiig the ltflH'U compounds thus produced to the liber anddhen oxidizing these leuco compounds. thus producing from yellow to red to blue shades on the fiber.

consisting in reacting on an acidylaminoanthraquinone with alkaline hydrosullites to form a solution. applying the leuco rompoumls thus produced to the tiber and then oxidizing thee-e leueo compounds. thus psur ducing from yellow to red to blue shades on the fiber.

consisting in reacting on diacct \'l-l.5-diaminimnthraqinnoin: with ll \'(ll() llllllt and The process of treating textilefiber 3. The process of treating textile fib r caustic soda lye to form a solution, applying 3 1.5 dinrninoanthraquinone which treaied the louco compounds thus reduced to the l fiber remains unchanged upon being boiled fiber and ihen oxidizing tiese leuco Cornpounds, ilius producing yellow shades on he fiber.

4. As :i new article of manufacture textile fiber impregnated with the oxidation prodnets of the ieuco com )OUDdS of an noidylamll'idflililiifiqlflllOne, winch treated fiber upon being touched with a Watery solution con taining (L-92; of anhydrous hydrosulfite of sodium and 2 of caustic soda changes its color of yellow to red to blue into 1 brownish shade which on ex: osure to air assumes again its original on or.

5; As a new article. of manufacture yellow textile fiber impregnated with the oxidation products of the leuco compounds of (liacetylwith a 10% mui'ialic acid and upon being touched with a cold solution of an alkalihypochlorite and which upon being touched with a watery solution containing 0.4% of anhydrous hydrosulfite of sodium and 0.8% of caustic soda changes its 'ellow color inm a brownish red shade, Wliicli on exposure to air assumes again its ori inal appearance.

In testimony whereof? liave'liereuntu set my hand in the presence of two subscribing witnesses.

ROBERT C MIDT. [1,. 8, lvlhiesgegi i Ono Komc, CHAS. J. WRIGHT. 

